New bronchospasmolytically active compounds exhibiting long duration of action and reduced undesired side effects of the structural formula
and therapeutically acceptable salts thereof, in which formula R is selected from the group consisting of -C(CH3)3,
and
R1 is selected from the group consisting of H and R2, R2 represents the radical of the formula
wherein R3 is selected from the group consisting of
(a) H
(b) alkyl groups containing 1-3 carbon atoms
wherein R5 is selected from the group consisting of
(a) OH
(b) alkoxy groups containing 1-3 carbon atoms and wherein
R4 is selected from the group consisting of
(a) H
(b) alkyl groups containing 1-3 carbon atoms, with the proviso that R3 and R4 are combined as follows:processes for the preparation thereof, chemical intermediates at their preparation, pharmaceutical preparations containing them, and their medicinal use.
及其治疗上可接受的盐类,其中式 R 选自-C(
CH3)3、
和
R1 选自 H 和 R2 组成的组,R2 代表式中的基团
其中 R3 选自以下组成的组
(a) H
(b) 含 1-3 个碳原子的烷基
其中 R5 选自以下组成的组
(a) OH
(b) 含 1-3 个碳原子的烷氧基,其中
R4 选自以下组成的组
(a) H
(b) 含 1-3 个碳原子的烷基,但 R3 和 R4 的组合方式如下:其制备工艺、制备时的
化学中间体、含有它们的药物制剂及其药用。